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  <title>使用公钥解密数据</title>
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  <div id="layout-content"><div id="function.openssl-public-decrypt" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">openssl_public_decrypt</h1>
  <p class="verinfo">(PHP 4 &gt;= 4.0.6, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">openssl_public_decrypt</span> &mdash; <span class="dc-title">使用公钥解密数据</span></p>

 </div>
 
 <div class="refsect1 description" id="refsect1-function.openssl-public-decrypt-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>openssl_public_decrypt</strong></span>
    ( <span class="methodparam"><span class="type">string</span> <code class="parameter">$data</code></span>
   , <span class="methodparam"><span class="type">string</span> <code class="parameter reference">&$decrypted</code></span>
   , <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$key</code></span>
   [, <span class="methodparam"><span class="type">int</span> <code class="parameter">$padding</code><span class="initializer"> = OPENSSL_PKCS1_PADDING</span></span>
  ] ) : <span class="type">bool</span></div>

  <p class="para rdfs-comment">
   <span class="function"><strong>openssl_public_decrypt()</strong></span> 解密先前由 <span class="function"><a href="openssl_private_encrypt.html" class="function">openssl_private_encrypt()</a></span> 加密的数据 <code class="parameter">data</code> 并且将结果保存至变量 <code class="parameter">decrypted</code>中。  
  </p>
  <p class="para">
   你可以用该函数来校验消息是否是私钥拥有者写的。
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.openssl-public-decrypt-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    
     <dt>
<code class="parameter">data</code></dt>

     <dd>

      <p class="para">
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">decrypted</code></dt>

     <dd>

      <p class="para">
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">key</code></dt>

     <dd>

      <p class="para">
       <code class="parameter">key</code> 必须是和用来加密数据的私钥配对的公钥。
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">padding</code></dt>

     <dd>

      <p class="para">
       <code class="parameter">padding</code> 可以是如下至
       <strong><code>OPENSSL_PKCS1_PADDING</code></strong>,
       <strong><code>OPENSSL_NO_PADDING</code></strong>.
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.openssl-public-decrypt-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   成功时返回 <strong><code>TRUE</code></strong>， 或者在失败时返回 <strong><code>FALSE</code></strong>。
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.openssl-public-decrypt-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="openssl_private_encrypt.html" class="function" rel="rdfs-seeAlso">openssl_private_encrypt()</a> - 使用私钥加密数据</span></li>
    <li class="member"><span class="function"><a href="openssl_private_decrypt.html" class="function" rel="rdfs-seeAlso">openssl_private_decrypt()</a> - 使用私钥解密数据</span></li>
   </ul>
  </p>
 </div>


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